Drive and control of motor generators



May 1, 1928. r 1,668,130

A. THOMAS DRIVE AND CONTROL OF MOTOR GENERATORS Filed May 17 1927Patented 'May 1, 1928.

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Application filed May 17,

My invention relates to improvements in the drive and control of motorgenerators particularly ap lied to railway; carriages, though it may e11applied to other purposes with the oxerclse of only mechanical skill. Itis well knownthatin applying motor generators to railway carriages greatdifiiculty has been encountered indevising a geared connection, whichhas many advantages over a belt drive system. Due to the momentum ofthegenerator armature driven at high speed, great stresses are thrown onthe gearing system of the drive when the train is quickly brought to astop, or even when the brakes are suddenly applied. 1 i

The objects of my invention are, first, to provide a gear drive for themotor generator; second, to provide a means of disconnecting thegenerator when the brakes are applied to stop the train; and third, tobring the generator armature to rest quickly after the gear drive hasbeen disconnected.

I attain these objects by the mechanism illustrated in the accompanyingdrawings,

- in which- Fig. 1 isa vertical section showing the complete device; 7

Fig. 2 is a plan of the device.

Similar numerals refer-to similar parts throughout the several views. p

1 is the underside of the chassis of a rai1- way carriage from which issupported in suitable relation the truck 2. The truck 2 which is ofwidely variable desi 11 carries the main wheel axles 3 upon whici arecarried the wheels 4. The wheels 4 rest on the rails 5. A suitable partof the truck frame 6 is utilized to support the bracket 7 upon which areformed the lugs 8. In these lugs 8 is carried the pivotal pin 9 uponwhich is pivotally mounted the motor generator 10. The shaft 11 of thegenerator 10 has keyed thereon the driven pinion 12 which meshes undercontrol with the" driving pinion 13 carried on the main wheel axle 3.Formed on the generator casing is a lever arm 14 to which is attached atension spring 15. The opposite end of the tension spring 15 passesthrough a lug 16 mounted on a convenient part 17 of thetruck 2. Thetension of thespring 15 is adjusted'by the nut 18. Supported by thebracket 7 before mentioned are the guide rods 19 supporting a brakeblock 21. Compression springs 22 are inserted between the bracket 7 andthe brake 1927. am- 151 no. 192,058.

block the of. the springs beingqicontrolled b the adjusting nuts 20. jThe: brake pulley l keyed to theshaft 11 of. thegenerator l0 comiesintofcontact with the brake block 21 when the generator is thrown intodisengaged positio: v

Carned'by the carriage chassis l is the air brake cylinder 23 having apiston rod 24 upon which is mounted a projecting pin 25. Also supportedby the chassis 1 is the bracket 26 in relation to the air brake cylinder23 upon which bracket is pivotally supported the lever 27 having its end28 slotted end of lever 27 is connected to the arm 1 of the generator 10by the cable 29.

for engagement with the pin 25. The other driving pinion 13 on theaxleof the carriage wheels and when the carriage is in motion the generatoris driven, thereby supplying electric current for lights or storage. Inbringing the carriage to rest the air brake is used in which operationthe piston rod 24 moves outwards from the air cylinder thereby actnatinrthe lever 27 which in turn pulls the ca le 29 anddisengages thegenerator drive. In swinging from enga ed to disengaged position thebrake pul ey 14 comes into contact with the brake shoe 21 and thearmature of the generator is quickly brought to rest. f

What I claim is:

1. The combination in a generator drive and control of a shaftproviding'a source of power having a pinion thereon, a generatorpivotally supported in relation to the power shaft, a pinion on thegenerator shaft adapted to engage with the pinion'on the; said powershaft, spring means influencing the said pinions to engagement controlmeans comprising a cable intermediate the generator and a reciprocatingpart of'adj acent machinery coordinatin the motion of the generator onits pivot-a support and the actuation of the adjacent machinery.

2. The combination in a generator drive and control of a shaft providinga source of power, a generator pivotally supported in relation theretohaving a pinion on the shaft thereof, a pinion on the said power shaftadapted to mesh with thepinion on the generator shaft, spring meansinfluencing the said pinions to engagement, :1 cable intermediate thegenerator and an adjacent on the power shaft, spring means infiuenc ingthe saidpinions to engagement, a drive control comprising a linkintermediate the generator and a lever actuated by an air brake, thesaid link disengaging the drive when the air brake is applied.

4. The combination in a generator drive and control, comprising a shaftproviding a source of power and having a pinion thereon, a generatorpivotally supported in relation thereto, a pinion on the said generatorshaft adapted to mesh with the pinion on the power shaft, a springinfluencing the pinions to engagement, control means comprising a cableintermediate the generator and an exterior air brake mechanism, the saidCOIltI'Ol disengaging the drive when the air brake is applied, and abrakeshoe yieldably supported in relation to a brake pulley on the saidgenerator shaft engaging when the generator drive is disconnected.

ARTHUR THOMAS.

